Turbo"d now pushing oil out the valve covers help please
04-22-2018, 06:50 PM
#1
Turbo"d now pushing oil out the valve covers help please well, my setup is the sloppy mechanics don't bs me build. 5.3 sloppy stage two cam 7875 80 lb injectors. Took it to the dyno and all was well until 15 lbs of boost, then oil and smoke spewed everywhere. I had my valve covers just open venting to the atmosphere and the tuner told me that wasn't enough. I put a breather on the passenger side oil fill now and still when coming up on boost it pukes oil onto the manifold and smokes like crazy. I was thinking about putting another passenger side valve cover on the drivers side and venting that oil fill too. I'm hoping that two one inch non baffled holes will be enough. I'm nervous because I've seen many guys with more boost than me having no issues with just the pcv stuff removed and open. I gapped my top rings at 26 and my bottom at 28. What are your guys thoughts and experiences with this. From what I've read my plan should work, but the internet has too much info for its own good sometimes and a lot of posts on this are old. Thanks in advance guys, the car runs great besides pissing oil 😡
04-22-2018, 07:18 PM
#3
Even with the rings gapped and methanol injection coming on at 8 lbs? God I hope I didn't, don't wanna pull the motor again....if I remember right u have a very similar build as mine, did u do anything different? Your cars making some good power
04-22-2018, 09:15 PM
#6
Launching!
Not sure what kind of intake you have or how you have hoses routed but make sure you don’t have any hoses running from the valve covers to the intake that don’t have a check valve in them...... I’m blow through but when I jumped up the boost I started pushing oil out of the breather on the oil fill cap..... I had a hose routed from under carb to driver side valve cover with no check valve in it.... which meant it was sucking crank case pressure under vacuum but when it turned to boost it was pressurizing the crank case..... so I have a vent on the oil fill cap and a hose going from driver side valve cover to carb base with a check valve that can only suck crank case pressure out..... just a thought
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04-22-2018, 09:54 PM
#8
Not sure what kind of intake you have or how you have hoses routed but make sure you don’t have any hoses running from the valve covers to the intake that don’t have a check valve in them...... I’m blow through but when I jumped up the boost I started pushing oil out of the breather on the oil fill cap..... I had a hose routed from under carb to driver side valve cover with no check valve in it.... which meant it was sucking crank case pressure under vacuum but when it turned to boost it was pressurizing the crank case..... so I have a vent on the oil fill cap and a hose going from driver side valve cover to carb base with a check valve that can only suck crank case pressure out..... just a thought
04-22-2018, 10:10 PM
#9
Launching!
My thoughts are you have to remove crank case pressure..... I’m not sure how guys are venting both sides and not pushing oil..... a friend did that same thing with a boosted single cab gmc.... he vented both valve covers and had oil coming out of both breathers.... added a line with a pcv valve from intake to valve cover and fixed it..... hope it’s an easy fix
04-23-2018, 07:09 AM
#17
All of your rear plugs are rich fouled to crap. Something going on causing your pass side to be rich compared to driver. For reference, I'm at 8 psi on 93 only and vent both valve covers no catch can no pvc and no puking oil.
Last edited by ddnspider; 04-23-2018 at 07:53 PM.
04-23-2018, 07:06 PM
#18
5,7 and 8 are oil fouled.... not gas fouled. Looks to me like you have 3 bad holes (oil control ring). Pretty sure that motor is hurt, especially given that's it's puking oil....in combination with looking at those plugs.
04-23-2018, 07:19 PM
#20